Sash-fastener



(No Model.)

- SASH FASTENER.

No. 808,055, Patentgtd Nov. 18,1884.

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ISAAC N. BUCK, OF ELGIN, ILLINOIS.

SASH-FASTENER.

SEJECIFICATION forming part of Letters Patent No. 308,055, dated November 18, 1881.

Application filed May l0, ISS-i. (No model.)

T0 all whom it may concern.-

Beit knownthat I, ISAAC N. BUCK, of Elgin, in the county of Kane and State of Illinois, have invented certain new and useful Improvements in Sash-Fasteners; and I do hereby declare that the following specification, taken in connection with the drawings furnished and forming a part of the same, is aclear, true, and complete description of my invention.

Sash-fasteners embodying my invention belong to that general class of fasteners which are applied to the meeting-rails of sashes; and the prime feature of novelty consists in the sweeps77 or lockingbars which are controlled by a thumb-lever, so that said sweeps are caused to approach each other inthe arc of a circle, and to embrace a portion of the keeper, and thereby draw the sash together, their presence in ahorizontal slot in said keeper serving to lock both sashes against vertical movement. rIhe keeper is novel in that it is a rectangular plate in cross-section, affording a base and a vertical lip, the latter being longitudinally slotted on -each side of a central portion which is embraced by the sweeps. I also rotatively couple the sweeps and provide the thumb-lever with a spring, and suitable notched seats, whereby both sweeps are securely held either in theirlocked or their unlocked positions. I also provide said sweeps with a spring or springs, whereby they are thrown from their unlocked to their locked position7 although without departure from certain portions of my invention said spring or springs may be reversely applied and relied upon solely for throwing said sweeps from their locked to their unlocked position. Vith the sweeps and their spring or springs which throw the sweeps from theirunlocked position I employ with the spring thumb-lever a releasing-bolt, which on striking one portion of the keeper trips the lever from its retaining-notch and allows the sweeps to be automatically thrown from their unlocked to their locked position.

All of the several features of invention may be embodied in one structure, or some of said features may be employed independently of others, and in either case the resulting sashfasteners will afford extraordinary security, confine the sash against undue rattling, and be convenient in use.

position.

Fig. 3 is a front or edge view of the fastener.

Fig. 4 illustrates a keeper in front View and in vertical cross-section. Fig. 5 is a perspective view of the thumb-lever detached. Fig. 6 is a perspective view of one of the sweeps detached. Fig. T is a View of the sweepsprings detached. Fig. S is a detached view of the spring latch-bolt, which on striking the keeper releases the thumb-lever from its notch. Fig. 9 is a plan View of the sweeps with their spring applied for throwing them from their locked to their unlocked position. Fig. l0 is a .planv View ot' my fastenerand its keeper, both in a slightly modified form. Fig. Il is a front and top view of the keeper of Fig. l0.v Fig. 12 is a perspective view of one of the sweeps of the fastener, Fig. l0, detached. Fig. 13 is a rear View of the casing. Fig. 14 is a sectional view ofthe fastener on line x, Fig. 2.

The keeper A is rectangular in crosssection, and has a base-plate, a, provided with lscrew-holes for securing it to a. sash, and a vertical lip, a', and two horizontal slots, a2, one on each side of a central post, ai. As shown in Fig. 4, the post c at each side is rounded or chamfered, and it has in its front face a central recess, at, in a vertical line, and having at its bottom an inclined surface.

. The fastener B comprises a suitable casing provided with screw-holes for enabling it to be secured to a sash, and having a base-plate, I), a top plate, b', a-nd a rim-plate, b2. It is immaterial how these portions of the casing are constructed, orihow they are united, so'

long as provision is made for properly assembling and mounting the working parts of the fastener therein. The curved or bowshaped sweeps c and c are substantially counterparts, and both of them have their outer l ends curved toward each other, and are both pivotally mounted in the casing, so that said outer ends swing toward and away from each other in the arc of a circle. Both sweeps adjacent to their pivots or axes are constructed in the form of toothed segments, which 'mesh with each other, and the sweep c is provided IOO l being coupled, are simultaneously caused to emerge from and retire within theY casing, and said casing is provided with notches d', as shown in Fig. 13, into which the thumb-lever d can be placed for locking or holding and thereby securing both sweeps in their protruded or their retired posit-ions.

As thus tar described these parts constitute a novel fastener Vof considerable value. it being obvious that by swinging the thumb-lever both sweeps will be made to enter the slots a2 and with their outer ends pass to the rear of the post a3, and by engaging therewith draw the sashes together; and also that the sweeps by occupying the slots lock the sashes against Vertical movement. Each sweep being curved and in the arc of a circle renders it practically impossible for either ot' them to be disengaged from the keeper-by means ot' a kniteblade,for instance, entered by way of the space between the sashes, even it' the thumb-lever be not properly engaged with its locking-recess. For still greater security.however,l provide these sweeps with springs. which throw them outward from the easing when permitted so to do by the thumb-lever, a'nd hold them in a locked position. and with a View to economy I make practically one spring serve i'or both sweeps, or rather I form two springs, c, of' one continuous piece of wire, the terminals of which hook upon studs e on the sweeps.

I also provide the pivoted thumb-lever cl with a spring, di, as seen in Fig. 14., which causes the outer end Vof said lever to be normally forced upward, or in the direction of its locking notches d, in a manner well known.

"While I prefer the sweep-springs to be so arranged as t0 throw the sweeps outwardly from the casing, I am aware that it is sometimes deemed desirable to have the sweeps provided with a spring` or springs which will throw them from their protruded or locked position to their unlocked or retired position, as illustrated in Fig. 9, and it is obvious that the spring shown needs only to be reversed for thus varying its action, and I therefore do not preclude myself from employing either ot' these particular arrangements o t' the sweepsprings.

Recognizing the limited demand for an automatically-operaied sash-fastener, which when the lower sash has been brought to its seat will be automatically sprung and locked, I have devised a spring latch-bolt, f, which, by contact with the inclined surface of the central recess, a", on the keeper, will cause a release ofthe spriugthumb-lever d from its retaining-notch, and allow' the sweep-springs to torce the sweeps outwardly into engagement with their keeper. This latch-bolt f has a protruding lateh-heathj", and its rear end at f2 has a slightly wedge-shaped sur. face, which slides bemath the top plat@ md against the upper surface ofthe thumb-lever, and therefore, when forced inwardly by con.

tact with the keeper, it forces the outer end ot' the thumb-lever downward out of its notch. The latch-bolt f is mounted upon a spring, f, which normally maintains the latchheadf in its properly-protruded position. It will be seen that this latch in no manner interferes with the operation of the other portions of the fastener, but that it necessarily involves, for use in combination therewith, sweep-springs which throw the sweeps outwardly from the case.

In Figs. l0, 11, and 12 I show my fastener and its keeper in a slightly modified form. The keeper A has the central post, a3. and the horizontal slots a are open at each end of the keeper, and the sweeps are slightly longer than those before described, and have vertical studs cl at their outer ends, which en gage with the rear edge of the vertical lip a', which is curved to generally conform to the are of the circle in which tile outer ends of the sweeps are moved. The top plate of the casing` is recessed near its edge for the reception of the studs c2 when the fastener is in its unlocked condition.

I am aware that piano-locks, &c., have heretofore contained two co operating pivoted bolts, and also that two pivoted cams geared Itogether have been operated by'a lever for use as a window lock and catch when applied to a window frame, and arranged to bear against a vertical surface on a sash at one side thereof; but 'I am not aware that any prior sash-fastener has embodied a pair of curved TOO sweeps coupled together and arranged to env gage with a keeper as now invented by me.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- 1. In a sash-fastener, the combination, substantially as hereinbet'ore described, with a keeper having a central post and aslot on each side thereot", ot a pair ot' pivoted curved sweeps geared together, and a thumb-lever connected to one ot' said sweeps for simultaneously cont-rolling both sweeps with reference to their engagement with or disengagement from said keeper.

2. In asash-fastener, the combination, with a casing, ot a pair of pivoted curved sweeps coupled together, a thumb-lever, notches in the casing t'or holding said lever in position, and a spring or springs for said sweeps, substantially as described.

3. In a sash-fastener, the combination, with a keeper, a pair ofeurved sweeps, their springs i'or throwing them into a locked position, and a thumblever t'or holding said sweeps in their lunlocked position, ot' a latch -bolt substantially as described, whereby when said latchbolt strikes the keeper the thumb-lever is made to release the sweeps and permit them to automatically engage with the keeper, as

set forth.

ISAAC N. BUCK. Vitnesses:

J W. Ransrnnn, n.. J. MANN.

IIO 

